SCHEDULED MAINTENANCE
The reactions of oxazolium, 1,3,4-oxadiazolium, 2-phenyloxazolo[3,2-a]pyridinium, oxathiolium, and thiazolium cations with primary amines are described. Ring-opening and reclosure to the corresponding azolium cations occur: in some cases open-chain or cyclic intermediates are isolated.
A. R. Katritzky and A. Zia, J. Chem. Soc., Perkin Trans. 1, 1982, 131 DOI: 10.1039/P19820000131
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